package org.example.util;

import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTVerifier;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.interfaces.DecodedJWT;

import java.util.Date;
import java.util.HashMap;
import java.util.Map;

/**
 * @ Author     ：hanxi
 * @ Date       ：Created in 23:38 2020/10/12
 * @ Description：
 */
public class TokenUtil {
    //设置过期时间
    private static final long EXPIRE_DATE=21*24*60*60000;
    //token秘钥
    private static final String TOKEN_SECRET = "ZCEQIUBFKSJBFJH2020BQWE";

    public static String token (String unionid){

        String token = "";
        try {
            //过期时间
            Date date = new Date(System.currentTimeMillis()+EXPIRE_DATE);
            //秘钥及加密算法
            Algorithm algorithm = Algorithm.HMAC256(TOKEN_SECRET);
            //设置头部信息
            Map<String,Object> header = new HashMap<>();
            header.put("typ","JWT");
            header.put("alg","HS256");
            //携带username，password信息，生成签名
            token = JWT.create()
                    .withHeader(header)
                    .withClaim("unionid",unionid)
                    .withExpiresAt(date)
                    .sign(algorithm);
        }catch (Exception e){
            e.printStackTrace();
            return  null;
        }
        return token;
    }

    public static boolean verify(String token){
        try {
            Algorithm algorithm = Algorithm.HMAC256(TOKEN_SECRET);
            JWTVerifier verifier = JWT.require(algorithm).build();
            DecodedJWT jwt = verifier.verify(token);
            return true;
        }catch (Exception e){
            e.printStackTrace();
            return  false;
        }
    }

    public static void main(String[] args) {
        String username ="zhangsan";
        String password = "123";
        String token = token(username);
        System.out.println(token);
//        boolean b = verify("eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJwYXNzd22yZCI6IjEyMyIsImV4cCI6MTU3ODE5NzQxMywidXNlcm5hbWUiOiJ6aGFuZ3NhbiJ9.IyTZT0tISQQZhGhsNuaqHGV8LD7idjUYjn3MGbulmJg");
//        System.out.println(b);
        DecodedJWT jwt = JWT.decode(token);
        String username1 = jwt.getClaim("username").asString();
        System.out.println(username1);


    }

}
